arranging a matrix

I have to create a matrix of dimension 240*7. I got one submatrix of 2*7 which is in a loop. there are 120 iteration for each time I got the 2*7 matrix. from these 2*7 matrices I want to create a 240*7 matrix. I don't know How to do it.how to arrange them. Now I need to combine these matrices into one large matrix; how do I do that? please help me.

Answer 1

[Thomas]

Perhaps you need something like this..

c=[]; 
for ii=1:120
a=rand(2,7);  %generate 2x7 matrix every loop
c=[c;a];      % every loop concatenates new 'a' to current output
end

size(c)

Answer 2

[Jan]

A pre-allocation is important:

c = zeros(240, 7); 
for ii = 1:2:240
  a = rand(2,7);
  c(ii:ii+1, :) = a;
end

An similar approach:

c = zeros(120, 2, 7); 
for ii = 1:120
  a = rand(2,7);
  c(:, ii, :) = a;
end
c = reshape(c, 240, 7);